Building cases?

I've been wandering through the Luthier's Corner occasionally because someday in the future eventually after I learn how to play a bit, I want to contemplate thinking about maybe building a bass. Possibly.Which has led me to wonder, what do you guys do for cases for custom, handbuilt and DIY basses? Do you build them yourself? I could see if you don't get too far from an established body shape you might be able to buy a case, but I've seen some funky shapes here. Does someone sell cases with cut to fit innards?